Fix flaky test testConsumeFromMultipleTopics#838
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Fix flaky test testConsumeFromMultipleTopics
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Gradle suite > Gradle test > com.linkedin.datastream.connectors.kafka.mirrormaker.TestKafkaMirrorMakerConnectorTask.testConsumeFromMultipleTopics FAILED java.lang.AssertionError: Metric KafkaMirrorMakerConnector.cff18360-e356-48eb-89e0-aa1d07d125d4.numPartitionFetchErrors must match exactly one BrooklinMetricInfo but it matched 0 expected [1] but found [0] at org.testng.Assert.fail(Assert.java:97) at org.testng.Assert.assertEqualsImpl(Assert.java:136) at org.testng.Assert.assertEquals(Assert.java:118) at org.testng.Assert.assertEquals(Assert.java:839) at com.linkedin.datastream.testutil.MetricsTestUtils.verifyMetrics(MetricsTestUtils.java:100) at com.linkedin.datastream.testutil.MetricsTestUtils.verifyMetrics(MetricsTestUtils.java:56) at com.linkedin.datastream.connectors.kafka.mirrormaker.TestKafkaMirrorMakerConnectorTask.testConsumeFromMultipleTopics(TestKafkaMirrorMakerConnectorTask.java:144)This test failing because of another test in AbstractKafkaConnector running at the same time hits "Error in PartitionDiscoveryThread` which results in additional metric registration. In the flaky test, the filter is missing and it finds additional metric and fails.
To fix this, adding the connector filter to only check for relevant metrics.